M. Tech. Electrical Engineering. / Discusses raptor codes as fundamentally designed for erasure control coding technique, however, the overall objective of this dissertation is to examine their efficacy as a forward error correcting code as well as their spectral efficiency in the IEEE 802.16e-2005 physical layer. The specific objectives include: to analyse the error performance of raptor codes in mobile WiMAX ; to investigate the error performance of the various LDPC code classes defined in the mobile WiMAX standard ; to compare the performance of raptor codes and LDPC codes over the Additive White Gaussian Noise (AWGN) channel and to compare the spectral efficiency of raptor codes with that of the LDPC codes.